Reducing building air leakage is the last of the low hanging fruits we have to make buildings more efficient in a cost effective way. Its also a great way to keep the bushfire smoke, dust and pollen from leaking in, helping to maintain the air quality inside. Aerotight are a building performance and air tightness testing company who specialise in the applying passive house principals for new and existing buildings. We work both in residential and commercial sectors with designers, builders and owners consulting, testing and retrofitting with the aim of maximum building performance for the lowest price.